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The Supertech oversize manganese-bronze valve guide for BMW S14 and S38 engines is designed for 7mm valve stems and has an outer diameter of 12.065mm. This oversize guide is used when guide bores have been reamed or worn and a larger OD is necessary to reestablish correct valve-to-guide clearance. Intended for both intake and exhaust positions, it supports head rebuilds requiring the specified oversize dimension.
Supertech BMW S14/S38 Manganese Bronze Intake/Exhaust Valve Guide 7mm Stem Oversize OD 12.065mm
